Investments in Real Estate Partnerships - Balance Sheet Summarized Financial Information (Details) - USD ($) $ in Thousands		Dec. 31, 2020		Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Investments in real estate, net		$ 2,817,713		$ 2,917,415
Acquired lease intangible assets, net		32,607		40,549
Other assets		216,907		200,920
Total assets		10,936,904		11,132,253
Notes payable		1,557,043		1,577,467
Acquired lease intangible liabilities, net		33,223		44,387
Other liabilities		97,321		96,388
Capital - Regency		73,235		76,613
Capital - Third parties		5,984,912		6,213,348
Total liabilities and equity		10,936,904		11,132,253
Investments in real estate partnerships (note 4)		467,155		469,522
US Regency Retail 1, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in real estate partnerships (note 4)		0	[1]	0	[2]
Other Liabilities [Member] | US Regency Retail 1, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in real estate partnerships (note 4)	[3]	4,401		3,943
Basis Difference [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity		(47,119)		(43,296)
Total Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total assets		3,067,227		3,158,884
Total Assets [Member] | US Regency Retail 1, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Total assets		85,006	[1]	87,231	[2]
Regency [Member]
Schedule of Equity Method Investments [Line Items]
Capital - Regency		509,873		508,875
Third Parties [Member]
Schedule of Equity Method Investments [Line Items]
Capital - Third parties		869,767		931,767
Total Liabilities and Capital [Member]
Schedule of Equity Method Investments [Line Items]
Total liabilities and equity		$ 3,067,227		$ 3,158,884

[1] The USAA partnership has distributed proceeds from debt refinancing and real estate sales in excess of Regency’s carrying value of its investment, resulting in a negative investment balance of $4.4 million, which is recorded within Accounts Payable and other liabilities in the Consolidated Balance Sheets.

[2] The USAA partnership has distributed proceeds from debt refinancing and real estate sales in excess of Regency’s carrying value of its investment resulting in a negative investment balance of $3.9 million, which is recorded within Accounts Payable and other liabilities in the Consolidated Balance Sheets.

[3] ^{The USAA partnership has distributed proceeds from debt refinancing and real estate sales in excess of Regency's carrying value of its investment resulting in a negative investment balance, which is recorded within Accounts payable and other liabilities in the Consolidated Balance Sheets.}